command: make --verbose/--quiet available to all subcommands

Add new CommonOptions entry points to move the existing --jobs to,
and relocate all --verbose/--quiet options to that.  This provides
both a consistent interface for users as well as for code.

Change-Id: Ifaf83b88872421f4749b073c472b4a67ca6c0437
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/303224
Reviewed-by: Raman Tenneti <rtenneti@google.com>
Tested-by: Mike Frysinger <vapier@google.com>

repo

@@ -281,6 +281,8 @@ def GetParser(gitc_init=False):
 
 def InitParser(parser, gitc_init=False):
   """Setup the CLI parser."""
+  # NB: Keep in sync with command.py:_CommonOptions().
+
   # Logging.
   group = parser.add_option_group('Logging options')
   group.add_option('-v', '--verbose',